Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
  • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
  • B23K26/08—Devices involving relative movement between laser beam and workpiece
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
  • B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
  • B25J18/00—Arms
  • B25J18/02—Arms extensible
  • B25J18/04—Arms extensible rotatable

Definitions

• the present invention relates to an apparatus for rotating at least one laser processing head about at least one axis with two coaxially juxtaposed tubes which are rotatably mounted about a common, forming the C-axis tube axis, and with two rotary actuators for rotating the two tubes around the common Tube axis, wherein the laser processing head, a laser beam is supplied via the inner tube.
• laser processing machines such as the TruLaser Cell 7000/8000, known
• the laser processing head has three linear and two axes of rotation. The axes of rotation are mutually perpendicular B and C axes.
• the associated B and C axis assemblies consist of two drive motors, each of which transmits the torques to the laser processing head via two B and C coaxial tubes via a B and C gearbox.
• the outer C-tube rotates the laser processing head about the C-axis
• the inner B-tube rotates about a B-axis connecting port of the laser processing head via a bevel gear such as a bevel gear.
• the two rotary actuators by a torque motor with two rotatably mounted in a common stator housing, axially spaced rotors and two arranged in the stator housing th, axially spaced solenoid coils are formed.
• the two rotors are designed as inner rotors and the stator housing as an outer stator housing.
• a directly driven torque motor with a stator housing and two independent rotors (rotors) is proposed.
• the large drive torque of a torque motor enables large accelerations and leads to high dynamics of the overall system.
• the stator housing contains two independent magnetic coils that independently excite the magnetic fields of the two rotors.
• Two torque motors are thus housed in a common stator housing, which eliminates complex production parts.
• the construction of the invention can be more compact and thus save space, and the assembly cost is significantly reduced.
• the reduced mass of the device according to the invention improves the dynamic behavior, the required drive power of the linear axes and thus the processing speed of the laser processing machine.
• the apparatus is provided for rotating a laser processing head about two right-angled B and C axes.
• a laser processing head connecting piece in the outer tube rotatably mounted about the B axis and an angle gear between the inner tube and the connecting piece can be provided.
• the two coaxial B and C tubes are connected at their opposite ends, for example, with two laser processing heads.
• the two tubes are then rotated by the two rotary actuators around the common tube axis.
• the two rotary drives are formed by a torque motor with two rotatably mounted rotatably mounted in a common stator housing, axially spaced rotors and two arranged in the stator housing, axially spaced solenoid coils.
• the two B and C tubes can then rotate about one or more gear, for example. Angular gear, the or the laser processing heads to an example.
• the cables of the two magnetic coils are provided on the same axial end face of the torque motor or led out of the torque motor, wherein the cables of a magnetic coil are guided past the other magnetic coil.
• each of the two rotors is assigned its own measuring system for determining its respective rotational position, wherein the two measuring systems can be arranged on different end faces of the torque motor.
• the device according to the invention is suitable for rotating the machining head of any type of machine tool, but in particular for rotating the laser machining head of a laser machining machine. In the latter case, the laser beam head, the laser beam over the inner tube, a arranged in the outer tube mirror and the rohrmundig designed connecting piece to be supplied.
• Fig. 1 shows the device according to the invention for rotating a laser machining head by means of a torque motor.
• the device 1 shown in Fig. 1 is used to rotate a laser processing head 2 about two right-angled B and C axes.
• the rotating device 1 comprises two coaxial nested tubes 3, 4, which are rotatably mounted about a common, the C-axis forming tube axis 5, two independent rotary actuators 6, 7 for rotating the two tubes 3, 4 to the common tube axis 5, a to Attachment of the laser processing head 2 serving the tubular connecting piece 8, which is rotatably mounted in an angled lower tube end 4a of the outer tube 4 about the B-axis, and provided between the inner tube 3 and the connecting piece 8 angle gear 9 in the form of a bevel gear.
• the two rotary drives 6, 7 are provided by a double-torque motor 10 with two axially spaced rotors 12a, 12b mounted rotatably in a common outer stator housing 11 and with two axially spaced inner magnet coils arranged in the stator housing 11 13a, 13b formed, each of which independently of each other magnetic fields for rotating the two rotors 12a, 12b can stimulate.
• the two rotors 12a, 12b unlike shown in Fig. 1, also have different diameters.
• the torque motor 10 is therefore a so-called internal rotor, in which the rotor is arranged on the inside and the stator on the outside.
• the upper rotor 12a is rotatably secured to the upper tube end of the inner tube 3 and rotatably supported by an upper radial bearing 14a in the stator housing 1 1 or in the overall housing 15.
• the lower rotor 12b is rotatably secured to the upper tube end of the outer tube 4 and rotatably supported by a lower radial bearing 14b in the stator housing 1 1 or in the overall housing 15.
• the two tubes 3, 4 via a Radiala- ger 16 against each other rotatably mounted around the tube axis 5, while the tubular connection piece 8 is rotatably mounted in the angled pipe end 4a of the outer tube 4 via a radial bearing 17 about the B axis ,
• the supply cables 18a, 18b of the two magnetic coils 13a, 13b are led out on the upper axial end side of the torque motor 0, wherein the cables 18b of the lower magnetic coil 13b in the stator housing 1 1 laterally past the upper magnetic coil 13a.
• a separate measuring system 19a, 19b with rotary encoder is provided for each rotor 12a, 12b, which is fastened in each case to the housing 15 of the rotary device 1.
• the measuring system 19 a for the rotor 12 a of the inner tube 3 is arranged above the torque motor 10 and the measuring system 19 b for the rotor 12 b of the outer tube 4 below the torque motor 10.
• the housing 15 of the rotating device 1 is arranged in a quill (not shown) and movable in three linear axes.
• the laser machining 2 a laser beam 20 is supplied via the inner tube 3, a mirror 21 arranged in the outer tube 4, and the tubular connecting piece 8.
• the laser head 2 By rotating one or both tubes 3, 4, the laser head 2 can be rotated about the B and / or the C axis.
• the lower mass of the torque motor 10 compared to two conventional drive motors improves the dynamic behavior, the required drive power of the linear axes and thus the processing speed of the laser processing machine.

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• Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Optics & Photonics (AREA)
• Mechanical Engineering (AREA)
• Plasma & Fusion (AREA)
• Robotics (AREA)
• Manufacture Of Motors, Generators (AREA)
• Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
• Laser Beam Processing (AREA)

Priority Applications (2)

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Publications (1)

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Citations (6)

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• 2012
  • 2012-07-26 DE DE102012213206.6A patent/DE102012213206A1/de not_active Ceased
• 2013
  • 2013-07-09 CN CN201380039751.8A patent/CN104540633B/zh not_active Expired - Fee Related
  • 2013-07-09 WO PCT/EP2013/064478 patent/WO2014016111A1/fr not_active Ceased
  • 2013-07-09 EP EP13734788.6A patent/EP2877314B1/fr not_active Not-in-force

Patent Citations (6)

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